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<div class="header">
  <div class="summary">
<a href="#func-members">Functions</a>  </div>
  <div class="headertitle">
<div class="title">tPeriodDetector<div class="ingroups"><a class="el" href="group__analysis.html">Analysis</a></div></div>  </div>
</div><!--header-->
<div class="contents">

<p>Period detection algorithm from Joel de Guzman's Q Audio DSP Library.  
<a href="#details">More...</a></p>
<table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="func-members"></a>
Functions</h2></td></tr>
<tr class="memitem:gaa0947f407eba0d205dfdb3f5221e8a68"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__tperioddetector.html#gaa0947f407eba0d205dfdb3f5221e8a68">tPeriodDetector_init</a> (tPeriodDetector *const detector, float lowestFreq, float highestFreq, float hysteresis, <a class="el" href="struct_l_e_a_f.html">LEAF</a> *const leaf)</td></tr>
<tr class="memdesc:gaa0947f407eba0d205dfdb3f5221e8a68"><td class="mdescLeft">&#160;</td><td class="mdescRight">Initialize a tPeriodDetector to the default mempool of a <a class="el" href="struct_l_e_a_f.html" title="Struct for an instance of LEAF.">LEAF</a> instance.  <a href="group__tperioddetector.html#gaa0947f407eba0d205dfdb3f5221e8a68">More...</a><br /></td></tr>
<tr class="separator:gaa0947f407eba0d205dfdb3f5221e8a68"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ga03431f353481718a4e573f4df4a0161f"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__tperioddetector.html#ga03431f353481718a4e573f4df4a0161f">tPeriodDetector_initToPool</a> (tPeriodDetector *const detector, float lowestFreq, float highestFreq, float hysteresis, tMempool *const mempool)</td></tr>
<tr class="memdesc:ga03431f353481718a4e573f4df4a0161f"><td class="mdescLeft">&#160;</td><td class="mdescRight">Initialize a tPeriodDetector to a specified mempool.  <a href="group__tperioddetector.html#ga03431f353481718a4e573f4df4a0161f">More...</a><br /></td></tr>
<tr class="separator:ga03431f353481718a4e573f4df4a0161f"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ga55e2ad80c68f2fbf0cafceee206abf3f"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__tperioddetector.html#ga55e2ad80c68f2fbf0cafceee206abf3f">tPeriodDetector_free</a> (tPeriodDetector *const detector)</td></tr>
<tr class="memdesc:ga55e2ad80c68f2fbf0cafceee206abf3f"><td class="mdescLeft">&#160;</td><td class="mdescRight">Free a tPeriodDetector from its mempool.  <a href="group__tperioddetector.html#ga55e2ad80c68f2fbf0cafceee206abf3f">More...</a><br /></td></tr>
<tr class="separator:ga55e2ad80c68f2fbf0cafceee206abf3f"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:gaed4bf4a51580ba6209dfe5d35a235644"><td class="memItemLeft" align="right" valign="top">int&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__tperioddetector.html#gaed4bf4a51580ba6209dfe5d35a235644">tPeriodDetector_tick</a> (tPeriodDetector *const detector, float sample)</td></tr>
<tr class="separator:gaed4bf4a51580ba6209dfe5d35a235644"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ga025e1bc096ca88fc2f6e493513f0d6fb"><td class="memItemLeft" align="right" valign="top">float&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__tperioddetector.html#ga025e1bc096ca88fc2f6e493513f0d6fb">tPeriodDetector_getPeriod</a> (tPeriodDetector *const detector)</td></tr>
<tr class="memdesc:ga025e1bc096ca88fc2f6e493513f0d6fb"><td class="mdescLeft">&#160;</td><td class="mdescRight">Get the periodicity for a given harmonic of the detected pitch.  <a href="group__tperioddetector.html#ga025e1bc096ca88fc2f6e493513f0d6fb">More...</a><br /></td></tr>
<tr class="separator:ga025e1bc096ca88fc2f6e493513f0d6fb"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ga9e836c21a0dcabe9f3438bc56e671f39"><td class="memItemLeft" align="right" valign="top">float&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__tperioddetector.html#ga9e836c21a0dcabe9f3438bc56e671f39">tPeriodDetector_getPeriodicity</a> (tPeriodDetector *const detector)</td></tr>
<tr class="separator:ga9e836c21a0dcabe9f3438bc56e671f39"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ga4a66a46a4a6bea562bae63640e6855a5"><td class="memItemLeft" align="right" valign="top">float&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__tperioddetector.html#ga4a66a46a4a6bea562bae63640e6855a5">tPeriodDetector_harmonic</a> (tPeriodDetector *const detector, int harmonicIndex)</td></tr>
<tr class="separator:ga4a66a46a4a6bea562bae63640e6855a5"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ga6bea587938466ba988a6e716446975ed"><td class="memItemLeft" align="right" valign="top">float&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__tperioddetector.html#ga6bea587938466ba988a6e716446975ed">tPeriodDetector_predictPeriod</a> (tPeriodDetector *const detector)</td></tr>
<tr class="separator:ga6bea587938466ba988a6e716446975ed"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ga3d58e36fafa3e5b5102175e2c9062010"><td class="memItemLeft" align="right" valign="top">int&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__tperioddetector.html#ga3d58e36fafa3e5b5102175e2c9062010">tPeriodDetector_isReady</a> (tPeriodDetector *const detector)</td></tr>
<tr class="separator:ga3d58e36fafa3e5b5102175e2c9062010"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:gad7d111b4c8dc6e7428ff2facdf90092a"><td class="memItemLeft" align="right" valign="top">int&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__tperioddetector.html#gad7d111b4c8dc6e7428ff2facdf90092a">tPeriodDetector_isReset</a> (tPeriodDetector *const detector)</td></tr>
<tr class="separator:gad7d111b4c8dc6e7428ff2facdf90092a"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ga3157c7b7e210eafb0286aef6f1843f94"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__tperioddetector.html#ga3157c7b7e210eafb0286aef6f1843f94">tPeriodDetector_setHysteresis</a> (tPeriodDetector *const detector, float hysteresis)</td></tr>
<tr class="memdesc:ga3157c7b7e210eafb0286aef6f1843f94"><td class="mdescLeft">&#160;</td><td class="mdescRight">Set the hysteresis used in zero crossing detection.  <a href="group__tperioddetector.html#ga3157c7b7e210eafb0286aef6f1843f94">More...</a><br /></td></tr>
<tr class="separator:ga3157c7b7e210eafb0286aef6f1843f94"><td class="memSeparator" colspan="2">&#160;</td></tr>
</table>
<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<p>Period detection algorithm from Joel de Guzman's Q Audio DSP Library. </p>
<h2 class="groupheader">Function Documentation</h2>
<a id="gaa0947f407eba0d205dfdb3f5221e8a68"></a>
<h2 class="memtitle"><span class="permalink"><a href="#gaa0947f407eba0d205dfdb3f5221e8a68">&#9670;&nbsp;</a></span>tPeriodDetector_init()</h2>

<div class="memitem">
<div class="memproto">
      <table class="memname">
        <tr>
          <td class="memname">void tPeriodDetector_init </td>
          <td>(</td>
          <td class="paramtype">tPeriodDetector *const&#160;</td>
          <td class="paramname"><em>detector</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">float&#160;</td>
          <td class="paramname"><em>lowestFreq</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">float&#160;</td>
          <td class="paramname"><em>highestFreq</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">float&#160;</td>
          <td class="paramname"><em>hysteresis</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype"><a class="el" href="struct_l_e_a_f.html">LEAF</a> *const&#160;</td>
          <td class="paramname"><em>leaf</em>&#160;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
          <td></td><td></td>
        </tr>
      </table>
</div><div class="memdoc">

<p>Initialize a tPeriodDetector to the default mempool of a <a class="el" href="struct_l_e_a_f.html" title="Struct for an instance of LEAF.">LEAF</a> instance. </p>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname"></td><td></td></tr>
  </table>
  </dd>
</dl>

</div>
</div>
<a id="ga03431f353481718a4e573f4df4a0161f"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ga03431f353481718a4e573f4df4a0161f">&#9670;&nbsp;</a></span>tPeriodDetector_initToPool()</h2>

<div class="memitem">
<div class="memproto">
      <table class="memname">
        <tr>
          <td class="memname">void tPeriodDetector_initToPool </td>
          <td>(</td>
          <td class="paramtype">tPeriodDetector *const&#160;</td>
          <td class="paramname"><em>detector</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">float&#160;</td>
          <td class="paramname"><em>lowestFreq</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">float&#160;</td>
          <td class="paramname"><em>highestFreq</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">float&#160;</td>
          <td class="paramname"><em>hysteresis</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">tMempool *const&#160;</td>
          <td class="paramname"><em>mempool</em>&#160;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
          <td></td><td></td>
        </tr>
      </table>
</div><div class="memdoc">

<p>Initialize a tPeriodDetector to a specified mempool. </p>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname"></td><td></td></tr>
  </table>
  </dd>
</dl>

</div>
</div>
<a id="ga55e2ad80c68f2fbf0cafceee206abf3f"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ga55e2ad80c68f2fbf0cafceee206abf3f">&#9670;&nbsp;</a></span>tPeriodDetector_free()</h2>

<div class="memitem">
<div class="memproto">
      <table class="memname">
        <tr>
          <td class="memname">void tPeriodDetector_free </td>
          <td>(</td>
          <td class="paramtype">tPeriodDetector *const&#160;</td>
          <td class="paramname"><em>detector</em></td><td>)</td>
          <td></td>
        </tr>
      </table>
</div><div class="memdoc">

<p>Free a tPeriodDetector from its mempool. </p>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">detector</td><td>A pointer to the tPeriodDetector to free. </td></tr>
  </table>
  </dd>
</dl>

</div>
</div>
<a id="gaed4bf4a51580ba6209dfe5d35a235644"></a>
<h2 class="memtitle"><span class="permalink"><a href="#gaed4bf4a51580ba6209dfe5d35a235644">&#9670;&nbsp;</a></span>tPeriodDetector_tick()</h2>

<div class="memitem">
<div class="memproto">
      <table class="memname">
        <tr>
          <td class="memname">int tPeriodDetector_tick </td>
          <td>(</td>
          <td class="paramtype">tPeriodDetector *const&#160;</td>
          <td class="paramname"><em>detector</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">float&#160;</td>
          <td class="paramname"><em>sample</em>&#160;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
          <td></td><td></td>
        </tr>
      </table>
</div><div class="memdoc">
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname"></td><td></td></tr>
  </table>
  </dd>
</dl>

</div>
</div>
<a id="ga025e1bc096ca88fc2f6e493513f0d6fb"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ga025e1bc096ca88fc2f6e493513f0d6fb">&#9670;&nbsp;</a></span>tPeriodDetector_getPeriod()</h2>

<div class="memitem">
<div class="memproto">
      <table class="memname">
        <tr>
          <td class="memname">float tPeriodDetector_getPeriod </td>
          <td>(</td>
          <td class="paramtype">tPeriodDetector *const&#160;</td>
          <td class="paramname"><em>detector</em></td><td>)</td>
          <td></td>
        </tr>
      </table>
</div><div class="memdoc">

<p>Get the periodicity for a given harmonic of the detected pitch. </p>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname"></td><td></td></tr>
  </table>
  </dd>
</dl>

</div>
</div>
<a id="ga9e836c21a0dcabe9f3438bc56e671f39"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ga9e836c21a0dcabe9f3438bc56e671f39">&#9670;&nbsp;</a></span>tPeriodDetector_getPeriodicity()</h2>

<div class="memitem">
<div class="memproto">
      <table class="memname">
        <tr>
          <td class="memname">float tPeriodDetector_getPeriodicity </td>
          <td>(</td>
          <td class="paramtype">tPeriodDetector *const&#160;</td>
          <td class="paramname"><em>detector</em></td><td>)</td>
          <td></td>
        </tr>
      </table>
</div><div class="memdoc">
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname"></td><td></td></tr>
  </table>
  </dd>
</dl>

</div>
</div>
<a id="ga4a66a46a4a6bea562bae63640e6855a5"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ga4a66a46a4a6bea562bae63640e6855a5">&#9670;&nbsp;</a></span>tPeriodDetector_harmonic()</h2>

<div class="memitem">
<div class="memproto">
      <table class="memname">
        <tr>
          <td class="memname">float tPeriodDetector_harmonic </td>
          <td>(</td>
          <td class="paramtype">tPeriodDetector *const&#160;</td>
          <td class="paramname"><em>detector</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">int&#160;</td>
          <td class="paramname"><em>harmonicIndex</em>&#160;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
          <td></td><td></td>
        </tr>
      </table>
</div><div class="memdoc">
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname"></td><td></td></tr>
  </table>
  </dd>
</dl>

</div>
</div>
<a id="ga6bea587938466ba988a6e716446975ed"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ga6bea587938466ba988a6e716446975ed">&#9670;&nbsp;</a></span>tPeriodDetector_predictPeriod()</h2>

<div class="memitem">
<div class="memproto">
      <table class="memname">
        <tr>
          <td class="memname">float tPeriodDetector_predictPeriod </td>
          <td>(</td>
          <td class="paramtype">tPeriodDetector *const&#160;</td>
          <td class="paramname"><em>detector</em></td><td>)</td>
          <td></td>
        </tr>
      </table>
</div><div class="memdoc">
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname"></td><td></td></tr>
  </table>
  </dd>
</dl>

</div>
</div>
<a id="ga3d58e36fafa3e5b5102175e2c9062010"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ga3d58e36fafa3e5b5102175e2c9062010">&#9670;&nbsp;</a></span>tPeriodDetector_isReady()</h2>

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      <table class="memname">
        <tr>
          <td class="memname">int tPeriodDetector_isReady </td>
          <td>(</td>
          <td class="paramtype">tPeriodDetector *const&#160;</td>
          <td class="paramname"><em>detector</em></td><td>)</td>
          <td></td>
        </tr>
      </table>
</div><div class="memdoc">
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname"></td><td></td></tr>
  </table>
  </dd>
</dl>

</div>
</div>
<a id="gad7d111b4c8dc6e7428ff2facdf90092a"></a>
<h2 class="memtitle"><span class="permalink"><a href="#gad7d111b4c8dc6e7428ff2facdf90092a">&#9670;&nbsp;</a></span>tPeriodDetector_isReset()</h2>

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        <tr>
          <td class="memname">int tPeriodDetector_isReset </td>
          <td>(</td>
          <td class="paramtype">tPeriodDetector *const&#160;</td>
          <td class="paramname"><em>detector</em></td><td>)</td>
          <td></td>
        </tr>
      </table>
</div><div class="memdoc">
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">￼￼￼</td><td></td></tr>
  </table>
  </dd>
</dl>

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<h2 class="memtitle"><span class="permalink"><a href="#ga3157c7b7e210eafb0286aef6f1843f94">&#9670;&nbsp;</a></span>tPeriodDetector_setHysteresis()</h2>

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          <td class="memname">void tPeriodDetector_setHysteresis </td>
          <td>(</td>
          <td class="paramtype">tPeriodDetector *const&#160;</td>
          <td class="paramname"><em>detector</em>, </td>
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          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">float&#160;</td>
          <td class="paramname"><em>hysteresis</em>&#160;</td>
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          <td>)</td>
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<p>Set the hysteresis used in zero crossing detection. </p>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">detector</td><td>A pointer to the relevant tPeriodDetector. </td></tr>
    <tr><td class="paramname">hysteresis</td><td>The hysteresis in decibels. Defaults to -40db. </td></tr>
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  </dd>
</dl>

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